After a cup of coffee is brewed, the grounds left behind are often discarded as waste. But researchers have found a way to turn them into a useful material for concrete.

Investigadores transformaron residuos del café en un tipo de biocarbón capaz de reemplazar parte de la arena utilizada en el concreto.

After a cup of coffee is brewed, the grounds left behind are often discarded as waste. But researchers have found a way to turn them into a useful material for concrete.